dcsimg
Please read BHL's Acknowledgment of Harmful Content
Sort By:
  1. By: Igl, Lawrence D - Johnson, Douglas H
    Type: Article
    In: The Canadian field-naturalist
    Volume: 121
    Issue: 3
    Date: 2007-07-01
    Page Range: 239--255
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Johnson, Douglas H - Igl, Lawrence D
    Type: Article
    In: The Wilson bulletin
    Volume: 107
    Issue: 4
    Date: 1995
    Page Range: 709--718
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  3. By: Johnson, Douglas H - Stewart, Robert E.
    Type: Article
    In: The Wilson bulletin
    Volume: 85
    Issue: 2
    Date: 1973
    Page Range: 148--162
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  4. By: Igl, Lawrence D - Johnson, Douglas H - Kantrud, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 113
    Issue: 4
    Date: 1999
    Page Range: 646--651
    Publication Info: Ottawa Ottawa Field-Naturalists' Club